Processing Technology of Parts in High-speed Wire Rod Mill

There are many kinds and specifications of high-speed wire rod mill, which has the characteristics of high line speed and continuous production. With the increasing requirements for the dimensional accuracy of finished products, the requirements for equipment performance and processing accuracy are more stringent, especially in the selection of parts and components, dimensional processing accuracy, shape, heat treatment status, assembly accuracy, etc.

The size, shape and position tolerances of the high-speed wire rod mill are very strict. Therefore, the welding case is welded with a flux-based wire, and all welds are inspected by the dye penetration method. In addition, two natural aging procedures have been added between roughing, semi-finishing and finishing, the purpose is to prevent the deformation of the box after processing.

Regarding the gears of the high-wire wire rolling mill, twentieth chromium and nickel-nickel four materials are selected. This material is hardened after carburizing and hardening, and the machining is difficult. But after heat treatment, cold and hot processing connection and improvement in processability, high accuracy can be achieved.

As a part of high-speed line rolling mill, the eccentric sleeve is also a processing difficulty. It is difficult to guarantee its surface quality and eccentricity with general processing methods. Therefore, a special grinding head and rolling head are designed for the larger eccentric sleeve on the vertical lathe. After turning, the inner and outer circles are precisely ground or the rolling is processed after finishing turning. The smaller eccentric sleeve is processed by the method of the upper eccentric mandrel.

There are also casting cases of various oil containers in high-speed wire rod mill. Because the internal surface quality directly affects the cleanliness of the oil, the post-treatment and painting, so the use of surface resin sand molding and thermochemical cleaning for the casting inner core can get a better surface of the inner cavity casting, and the key is that the cost is not increased much.

Assembly is an important part to ensure the quality of high-speed wire rod mills. After the parts are processed, only after careful assembly can they achieve excellent performance. Similar equipment abroad uses a keyless connection method, which brings greater work intensity and risk to the assembly.

Therefore, we still use the combination of cold and hot mounting to align the gear wheel teeth and the key slot of the shearing machine, and use the rotary arm assembly to position the scribe line and measure the key slot after machining to ensure accuracy; in the assembly of gear box, the eccentric sleeve is used to adjust the contact area and contact area of the gear teeth so that it can meet the design requirements.